Knurled turbine tip seal

Details Knurled turbine tip seal Knurled turbine tip seal

1985-09-13

1987-03-24

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Erodable or permanently deformable

415172A, F01D 1100

Patent

active

046522093

ABSTRACT:
A turbine tip seal 10 for inhibiting fluid leakage between a turbine housing and the shroud 20 and runners 24 which are typically attached to turbine blade tips 18. The tip seal 10 has a resilient ring 28 and a plated layer 32. Plated layer 32 has a knurled inner surface 34. The knurled surface 34 allows only a small amount of fluid leakage between itself and the turbine blades 18 while maintaining high rotor stiffness.

REFERENCES:
patent: 2333343 (1943-11-01), Sendzimir
patent: 3412977 (1968-11-01), Moyer et al.
patent: 3487519 (1970-01-01), Davidson
patent: 3529905 (1970-09-01), Meginnis
patent: 3603599 (1971-09-01), Laird
patent: 3843278 (1974-10-01), Torell
patent: 3860358 (1975-01-01), Cavicchi et al.
patent: 3880435 (1975-04-01), Thornbald
patent: 4354687 (1982-10-01), Holland et al.
patent: 4405284 (1983-09-01), Albrecht et al.
patent: 4433845 (1984-02-01), Shiembob
NASA Tech Brief 10607 Dec. 1967.

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